2121212202001 has 32 divisors (see below), whose sum is σ = 2268194400000. Its totient is φ = 1983678909696.

The previous prime is 2121212201959. The next prime is 2121212202013. The reversal of 2121212202001 is 1002022121212.

It is a happy number.

It is not a de Polignac number, because 2121212202001 - 2¹³ = 2121212193809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121212202041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1248505450 + ... + 1248507148.

It is an arithmetic number, because the mean of its divisors is an integer number (70881075000).

Almost surely, 2^{2121212202001} is an apocalyptic number.

It is an amenable number.

2121212202001 is a deficient number, since it is larger than the sum of its proper divisors (146982197999).

2121212202001 is a wasteful number, since it uses less digits than its factorization.

2121212202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 3192 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2121212202001 its reverse (1002022121212), we get a palindrome (3123234323213).

The spelling of 2121212202001 in words is "two trillion, one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, one".